XPS 13 Dev: Why does Dell disable the windows key?

Is there a key combination that disables the Windows key on the XPS 13 Windows edition?

This is in regards to to this question:

purposely installs the package 'dell-super-key' which disables the Windows key.

I am not sure why Dell would install such a package, so I am asking about the XPS 13 (windows).

I know if its common on Windows to offer an option to disable the Windows key, such as when gaming.

Is there a key combo, or a software that disables the Windows key on the XPS13 Windows edition?

I believe there is a key combination to enable/disable the Windows key in Ubuntu, however this isn't

documented. I can easily uninstall 'dell-super-key' but if it offers me the option to turn the Windows key

on and off at will I would rather keep in installed or back it up for later use before removing it.